Rollout On Knees muscles:Lower Back, Deltoids, Rectus Abdominis auxiliary muscles:Pectoralis Major, Obliques, Serratus Anterior, Teres Muscles, Quadriceps, Latissimus Dorsi, Trapezius required:Dumbbells (2) / Barbell / EZ Bar optional:Fitness Mat fitness level:Hard exercise type:Strength exercise benefits and how to do Rollout On Knees